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Finding the Fourth Proportional to 91,963.17, 137,870.28 and 28,750.77

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Solution

The fourth proportional to 91,963.17, 137,870.28 and 28,750.77 is: 43,102.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,963.17 : 137,870.28 = 28,750.77 : x
  2. Step 2: Convert to fraction form
    91,963.17/137,870.28 = 28,750.77/x
  3. Step 3: Cross multiply
    91,963.17x = 137,870.28 × 28,750.77
  4. Step 4: Simplify right side
    91,963.17x = 3,963,876,710.12
  5. Step 5: Solve for x
    x = 3,963,876,710.12/91,963.17
  6. Step 6: Final answer
    x = 43,102.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.